000
AXPZ20 KNHC 280359
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
0405 UTC WED NOV 28 2007

TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN
FROM THE EQUATOR TO 32N...EAST OF 140W. 

BASED ON 0000 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY
THROUGH 0345 UTC.
 
...ITCZ...
INTERTROPICAL CONVERGENCE ZONE...8N83W 8N105W 10N120W 8N140W. 
SCATTERED MODERATE WITHIN 90-120 NM OF THE AXIS BETWEEN 95W AND 
106W...AND BETWEEN 123W AND 135W. 

SCATTERED MODERATE CONVECTION FROM 15N TO 21N BETWEEN 115W AND 
120W.

...DISCUSSION...
AMPLIFIED PATTERN REMAINS IN PLACE ACROSS THE DISCUSSION
AREA WITH A MIDDLE TO UPPER LEVEL CYCLONIC CIRCULATION CENTER 
NEAR 25N122W. ASSOCIATED TROUGH COVERED THE AREA N OF 18N 
BETWEEN 115W AND 133W. UPSTREAM ANTICYCLONE WAS NEAR 30N141W 
WITH THE ASSOCIATED RIDGE DOMINATING THE FAR NW CORNER OF THE 
AREA. THE RIDGE WAS ACCOMPANIED BY STRONG UPPER LEVEL SUBSIDENCE 
AROUND THE SRN PERIPHERY WITH A SMALL SCALE CYCLONIC CIRCULATION 
UNDERCUTTING THE RIDGE NEAR 21N142W. AXIS OF SUBTROPICAL JTST 
WAS ADVECTING MIDDLE TO UPPER LEVEL CLOUDS GENERALLY WITHIN THE 
AREA S OF 20N W OF 110W AND ALSO N OF 20N BETWEEN 105W AND 120W. 
A SECOND UPPER LEVEL RIDGE AXIS WAS NOTED OVER THE DEEP TROPICS 
ALONG 8N123W 15N112W AND WAS DISCONNECTED FROM ANOTHER RIDGE 
OVER N-CENTRAL MEXICO EXTENDING NWD INTO THE SW CONUS. 
STRONGLY DIFLUENT FLOW WAS NOTED BETWEEN THE RIDGE OVER MEXICO 
AND THE CYCLONIC CIRCULATION. THIS FLOW WAS AIDING IN THE 
MAINTENANCE OF SCATTERED MODERATE CONVECTION IN THE VICINITY OF 
A SURFACE TROUGH ALONG 20N117W 11N124W. 

ELSEWHERE AT THE SURFACE HIGH PRESSURE DOMINATED THE AREA N OF
20N W OF 120W.   

A 0006 UTC HIGH RESOLUTION QUIKSCAT PASS INDICATED 30 TO 35 KT 
WINDS IN THE GULF OF TEHUANTEPEC. THESE WINDS SHOULD CONTINUE 
FOR ANOTHER 24 HOURS BEFORE DIMINISHING TO LESS THAN GALE FORCE. 
HOWEVER WINDS SHOULD PULSE BETWEEN 25 AND 30 KT THROUGH 48 
HOURS. THE SAME QUIKSCAT PASS NOTED NE WINDS OF 20 TO 25 KT IN 
THE GULF OF PAPAGAYO. THESE WINDS ARE THE RESULT OF HIGH 
PRESSURE BUILDING ACROSS THE CARIBBEAN SEA FORCING STRONG WINDS 
AGAINST MOUNTAIN GAPS IN CENTRAL AMERICA.
  
$$
COBB